Improvement in automatic regulating-valves



6. L. rmson. Atumatic yRegulating Valves.

'Patented August 19, 1873.

NITE" STATES GEORGE L. KITSON, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO HIMSELF AND GEORGE W. CARR, OF SAME PLACE.

IMPROVEMENT IN AUTOMATIC REGULATINGVALVES.

Specification forming part of Letters Patent No. 142,027, dated August 19, 1873; application filed June 28, 1873.

To allaohom it may conccwu Be it known that I, GEORGE L. KrrsoN, of Philadelphia, Pennsylvania, have invented an Improved Automatic Regulating-Valve, of which the following is a specification:f

The object of my invention is to improve the automatic regulating-valve for which Letters Patent were granted to meon the 20th of May, 1873, as regards sensitiveness and accuracy of action; and this object I attain by so regulating the course of the steam thatit shall exert no lateral pressure against the valve, and by such an arrangement of' inlet and outlet openings to and from the chamber of the valve that there shall be no hesitation in the action of the same when it is depressed.

In the accompanying drawing, Figure 1 is a vertical section of chest and valve; Fig. 2, a sectional plan on the line 1 2, Fig. 1, and Fig. 3, a vertical section on the line 3 4, Fig. 2.

A is the valve-chest, intercepting the continuity of the steam-pipe from a boiler to an engine, a being the inlet nearest to the boiler, and a the outlet nearest to the engine, and the steam passing ythrough the chest :in the direction pointed out by the arrows. The interior of the chest is separated into two compartments, D and D,partly by the cylindrical casin g E forming part of the chest, and partly the cylinder F closed at the bottom, and having at the top a flange fitted to the casing E. A valve, G, fits snugly, but 'so as to slide freely, in the-cylinder F, and this valve is attached by a rod, @,'to a float, H, which is partially immersed in mercury contained in the lower portion of the cylinder F. The steam from the boiler, admitted to the compartment D, passesthence through openings ff formed in the casing E and cylinder F into the interior of the latter, and thence through openings hh into the chamber D', and thence through the outlet a to the engine, as pointed out by the arrows.

The valve operates on precisely the same principles as those described in my aforesaid patent'of May 20, 1873-that is to say, any change in the pressure of steam in thewboilen causing differences of pressure on Yopposite sides of the valve in the chest, will induce the said valve to oppose or obstruct the passage of steam through the chest to an extent proportionate to any increase or decrease in the speed of the engine, rinthe pressure of' the boiler.

In my aforesaid patent, however, the steam passed through the chest in a direction at right angles to that in which the valve moved, hence there was a lateral pressure against the valve, which detracted from the sensitiveness of :its action.

I overcome this difficulty partly by causing the steam to enter the chest in the same direction in which the valve moves, and partly by causing the steam in the chest to enter the cylinder F from opposite sides of the same through the openings f f, and to leave the cylinder at opposite sides through the openings h h. By this arrangement the valve is relieved from all unequal lateral pressure.

It will be noticed that the bottom of the inlet-openin gs f fto the cylinder F are slightly below the bottom of' the outlet-openings h h,- consequently the outlet-openings must be closed before the inlet-openings, and there will .always be a pressure of steam from the boiler beneath the valve. This arrangement, as I have found, prevents any tendency of the valve to remain depressed, and insures a more sensitive action of the valve.

For stationary engines I prefer the balancing of the valve by a loat partly immersed in a supply of mercury to the weighted lever described in my aforesaid patent.

I claim as my invention- 1. The automatic regulating-valve G, combined with a chest to which steam is admitted in the same direction as that in which the valve moves, all substantially as and for the purpose described. y

2. The automatic regulating-valve G, operating within a cylinder or chamber, F, t0

which steam is admitted from opposite sides, pressure of steam beneath the valve, as set and from opposite sides of which steam esforth. capes, as set forth. In testimony whereof I have signed my 3. The automatic regulating-valve G, s0 naine to this specification in the presence of Combined with a cylinder or chamber, and two subscribing Witnesses. inlet and outlet passages, that during the op- Witnesses: eration of the valve the outlet-passages Will be closed, While the inlet-passages permit a GEORGE L. KITSON. WM. A. STEEL, HUBERT HoWsoN. 

